comb(1)
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comb Command
combine SCCS deltas
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SYNTAX
comb [-o] [-s] [-psid] [-clist] files
DESCRIPTION
Comb generates a shell procedure (see sh(1)) that reconstructs
the given SCCS files. The reconstructed files will usually be
smaller than the original files. The arguments may be specified
in any order, but all keyletter arguments apply to all named SCCS
files. If a directory is named, comb behaves as though each file
in the directory were specified as a named file, except that
non-SCCS files (last component of the path name does not begin
with s.) and unreadable files are silently ignored. If a name of
- is given, the standard input is read; each line of the input is
taken to be the name of an SCCS file to be processed; non-SCCS
files and unreadable files are silently ignored. The generated
shell procedure is written on the standard output.
The keyletter arguments are as follows. Each is explained as
though only one named file is to be processed, but the effects of
any keyletter argument apply independently to each named file.
-pSID The SCCS IDentification string (SID) of the oldest delta
to be preserved. All older deltas are discarded in the
reconstructed file.
-clist A list (see get(1) for the syntax of a list) of deltas to
be preserved. All other deltas are discarded.
-o For each get -e generated, this argument causes the
reconstructed file to be accessed at the release of the
delta to be created. Otherwise, the reconstructed file
would be accessed at the most recent ancestor. Using the
-o keyletter may decrease the size of the reconstructed
SCCS file. It may also alter the shape of the delta tree
of the original file.
-s This argument makes comb generate a shell procedure that
produces a report giving, for each file: the file name,
size (in blocks) after combining, original size (also in
blocks), and percentage change computed by:
100 * (original - combined) / original
You should use this option before any SCCS files are
DG/UX 4.00 Page 1
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comb(1)
actually combined, to determine how much space is saved
by the combining process.
If you supply no keyletter arguments, comb will preserve only
leaf deltas and the minimal number of ancestors needed to
preserve the tree.
FILES
s.COMB The name of the reconstructed SCCS file.
comb????? Temporary.
SEE ALSO
admin(1), delta(1), get(1), help(1), prs(1), sh(1).
sccsfile(4) in the Programmer's Reference for the DG/UX System
"Source Code Control System" in the Programmer's Guide to the
DG/UX System.
DIAGNOSTICS
Use help(1) for explanations.
BUGS
Comb may rearrange the shape of the tree of deltas. It may not
save any space; in fact, the reconstructed file can be larger
than the original.
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)